Screw thread adhesion abrasion resisting self-lubricating coating and preparation method thereof

Abstract

The invention relates to a self-greasing paint which can prevent screw thread from sticking and wearing and a preparation method thereof. The self-greasing paint which can prevent screw thread from sticking and wearing is a two-component self-greasing paint that consists of a component A and a component B. Component A consists of raw materials with weight proportion of 40-90 percent of film-forming material, 5-60 percent of solid greasing material, 0-10 percent of additive, 0-50 percent of solvent, 0-10 percent of color paint and 0-10 percent of filling while component B consists of raw materials with weight proportion of 50-100 percent of curing agent and 0-50 percent of solvent. The weight ratio of component A and component B is 1 to 0.1-5. The friction coefficient of the coat formed by the paint is low and the paint has self greasing function, anti-sticking and wearing resistant performances; the invention reduces and even avoids the use of grease and solves pollution problem caused by grease. The self-greasing paint is applicable to various mechanical parts such as bolt, screw, etc., in particular to screw threads of oil pipe, cashing and drill rod, etc. that are special for oil industry.

Description

technical field [0001] The invention relates to the field of coatings, in particular to a self-lubricating coating for preventing or reducing screw thread adhesive wear. Background technique [0002] Many pipes are connected by threads. During the service process, it is often necessary to repeat the make-up and break-out operations many times. Sometimes a large enough torque is required to complete the make-up and break-out operations of the threads. Large make-up and break-out torques are likely to cause adhesive wear. [0003] At present, the method of coating lubricating grease on the thread surface is usually used to prevent adhesive wear. However, lubricating grease has the following problems: first, human safety issues. Most of the lubricating oils we use now are industrial synthetic oils, some of which contain substances that are harmful to the human body. Most of these lubricating oils are volatile, which may cause the accumulation of harmful substances in the huma...

AI Technical Summary

Problems solved by technology

However, lubricating grease has the following problems: first, human safety issues

Also, most of these lubricating oils are volatile, which may cause the accumulation of harmful substances in the human body.

Second, the problem of environmental pollution

Once the lubricating grease leaks into the environment, it will cause certain adverse effects on the environment

Third, some high-alloy pipes or bolts, due to their low hardness, the threads are still prone to adhesive wear even when lubricating grease is applied

Fourth, some pipes or fittings work immersed in liquid. Since the lubricating grease is flowable, the lubricating grease will flow into the surrounding working fluid and damage the performance of the fluid.